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      <img src="../logo.svg" class="logo" alt=""><h1>Get average distance for ONE demographic group versus everyone else</h1>
      <small class="dont-index">Source: <a href="https://github.com/USEPA/EJAM/blob/HEAD/R/plot_distance_mean_by_group.R" class="external-link"><code>R/plot_distance_mean_by_group.R</code></a></small>
      <div class="d-none name"><code>distance_by_group1.Rd</code></div>
    </div>

    <div class="ref-description section level2">
    <p>Get average distance for ONE demographic group versus everyone else</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu"><a href="distance_by_group.html">distance_by_group1</a></span><span class="op">(</span></span>
<span>  <span class="va">results_bybg_people</span>,</span>
<span>  demogvarname <span class="op">=</span> <span class="fu"><a href="namesbyvarlist.html">varlist2names</a></span><span class="op">(</span><span class="st">"names_d"</span><span class="op">)</span><span class="op">[</span><span class="fl">1</span><span class="op">]</span>,</span>
<span>  demoglabel <span class="op">=</span> <span class="fu"><a href="fixcolnames.html">fixcolnames</a></span><span class="op">(</span><span class="va">demogvarname</span>, <span class="st">"r"</span>, <span class="st">"shortlabel"</span><span class="op">)</span></span>
<span><span class="op">)</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>


<dl><dt id="arg-results-bybg-people">results_bybg_people<a class="anchor" aria-label="anchor" href="#arg-results-bybg-people"></a></dt>
<dd><p>data.table from doaggregate()$results_bybg_people</p></dd>


<dt id="arg-demogvarname">demogvarname<a class="anchor" aria-label="anchor" href="#arg-demogvarname"></a></dt>
<dd><p>e.g., "pctlowinc"</p></dd>


<dt id="arg-demoglabel">demoglabel<a class="anchor" aria-label="anchor" href="#arg-demoglabel"></a></dt>
<dd><p>e.g., "Low Income Residents"</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
    <p>list of 2 numbers: avg_distance_for_group and avg_distance_for_nongroup</p>
    </div>
    <div class="section level2">
    <h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
    <p>Note on Avg Distance and range of distances in each Demog group, &amp; %D as function of distance:</p>
<p>We have info on each blockgroup near each site, which means some small % of those bgs are duplicated in this table:</p>
<p></p><div class="sourceCode"><pre><code><span id="cb1-1"><a href="#cb1-1" tabindex="-1"></a>results_bybg_people</span></code></pre><p></p></div>
<p>Mostly we want overall (not by site) to know avg and cum distrib of distances in each demog,</p>
<p>(and also %D as a function of continuous distance),</p>
<p>and for those stats we would want to take only unique blockgroups from here,
using the shorter distance, so the distribution of distances does not doublecount people.</p>
<p>But we might also want to see that distribution of distances by D for just 1 site?</p>
<p>And we might also want to see the %D as a function of continuous distance at just 1 site?</p>
<p>So to retain flexibility doaggregate() reports all instances of blockgroup-site pairings.</p>
    </div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p><code><a href="plot_distance_mean_by_group.html">plot_distance_mean_by_group()</a></code>  <code>distance_by_group()</code></p></div>
    </div>

    <div class="section level2">
    <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span> <span class="va">y</span> <span class="op">&lt;-</span> <span class="fu"><a href="ejamit.html">ejamit</a></span><span class="op">(</span><span class="va">testpoints_100</span>, radius <span class="op">=</span> <span class="fl">3</span><span class="op">)</span></span>
<span> </span>
<span> <span class="co"># see barplot and table comparing groups to see which are closer to sites analyzed</span></span>
<span> <span class="fu"><a href="plot_distance_mean_by_group.html">plot_distance_mean_by_group</a></span><span class="op">(</span><span class="va">y</span><span class="op">$</span><span class="va">results_bybg_people</span><span class="op">)</span> <span class="co"># or distance_mean_by_group() synonym</span></span>
<span> </span>
<span> <span class="co"># table - proximity of sites for just one demog group vs rest of population</span></span>
<span> <span class="fu"><a href="https://rdrr.io/r/base/print.html" class="external-link">print</a></span><span class="op">(</span><span class="fu">distance_by_group</span><span class="op">(</span><span class="va">y</span><span class="op">$</span><span class="va">results_bybg_people</span>,</span>
<span>   demogvarname <span class="op">=</span> <span class="st">'pctlowinc'</span><span class="op">)</span><span class="op">)</span></span>
<span>   </span>
<span> <span class="co"># plot cumulative share of group by distance vs overall population</span></span>
<span>  <span class="fu"><a href="distance_by_group_plot.html">distance_by_group_plot</a></span><span class="op">(</span><span class="va">y</span><span class="op">$</span><span class="va">results_bybg_people</span>,</span>
<span>     demogvarname <span class="op">=</span> <span class="st">'pctlowinc'</span> <span class="op">)</span></span>
<span>     </span>
<span> <span class="co"># plot cum. shares for two groups  </span></span>
<span> <span class="co"># about 14% of black and 12% of asian residents have a site within 1 mile. </span></span>
<span> <span class="co"># 29% vs 21% have a site within 1.5 miles.</span></span>
<span> <span class="fu"><a href="https://rdrr.io/r/base/Round.html" class="external-link">round</a></span><span class="op">(</span><span class="va">xyz</span><span class="op">[</span><span class="fu"><a href="https://rdrr.io/r/base/findInterval.html" class="external-link">findInterval</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">1</span>, <span class="fl">1.5</span><span class="op">)</span>,  <span class="va">xyz</span><span class="op">$</span><span class="va">dist</span><span class="op">)</span>, <span class="op">]</span>, <span class="fl">3</span><span class="op">)</span> </span>
<span> </span>
<span> <span class="co"># plot is too busy for all groups at once so this is a way to tap through them 1 by 1</span></span>
<span> <span class="va">these</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="va">names_d</span>, <span class="va">names_d_subgroups</span><span class="op">)</span></span>
<span> <span class="kw">for</span> <span class="op">(</span><span class="va">i</span> <span class="kw">in</span> <span class="fl">1</span><span class="op">:</span><span class="fu"><a href="https://rdrr.io/r/base/length.html" class="external-link">length</a></span><span class="op">(</span><span class="va">these</span><span class="op">)</span><span class="op">)</span> <span class="op">{</span></span>
<span>   <span class="fu"><a href="https://rdrr.io/r/base/readline.html" class="external-link">readline</a></span><span class="op">(</span><span class="st">"press any key to see the next plot"</span><span class="op">)</span></span>
<span>   <span class="fu"><a href="https://rdrr.io/r/base/print.html" class="external-link">print</a></span><span class="op">(</span><span class="fu"><a href="distance_by_group_plot.html">distance_by_group_plot</a></span><span class="op">(</span><span class="va">y</span><span class="op">$</span><span class="va">results_bybg_people</span>, demogvarname <span class="op">=</span> <span class="va">these</span><span class="op">[</span><span class="va">i</span><span class="op">]</span><span class="op">)</span> <span class="op">)</span></span>
<span> <span class="op">}</span></span>
<span> </span>
<span></span></code></pre></div>
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